New Attack Combines Ghost SPNs and Kerberos Reflection to Elevate Privileges on SMB Servers

A sophisticated privilege escalation vulnerability in Windows SMB servers, leveraging Ghost Service Principal Names (SPNs) and Kerberos authentication reflection to achieve remote SYSTEM-level access. Microsoft designated this as CVE-2025-58726, an “SMB Server Elevation of Privilege” flaw impacting all Windows versions absent enforced SMB signing. According to Semperis, the issue persists in environments with default Active […]

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